Aligner stage analysis to obtain mechanical interactions of aligners and teeth for treatment planning

Abstract

Systems and methods of simulating, modeling, and validating orthodontic treatment are disclosed. The method may include designing an orthodontic treatment system or force system, generative a displacement field between a first position of a patient's teeth and a second position, modeling the three-dimensional force-displacement model generated by the treatment system or force system, and validating the treatment system or force system. The methods disclosed herein may be iterated to optimize the orthodontic force system or treatment system.

What is claimed is: 
     
       1. A method of mapping mechanical interactions, the method comprising:
 (a) generating an orthodontic treatment plan to move a patient's teeth from an initial position toward a final position, the treatment plan comprising a first stage and a second stage; 
 (b) building a 3D model of an orthodontic appliance at the second stage; 
 (c) building a 3D model of the patient's teeth at the first stage; 
 (d) mapping spatial differences between the 3D model of the orthodontic appliance at the second stage and the 3D model of the patient's teeth at the first stage; 
 (e) evaluating mechanical interactions of the orthodontic appliance at the second stage with the patient's teeth at the first stage, wherein the evaluating is based at least in part on the mapped spatial differences; and 
 (f) mapping forces applied by the orthodontic appliance at the second stage to each tooth of the patient's teeth at the first stage, wherein the mapping of the applied forces is based at least in part on the evaluated mechanical interactions. 
 
     
     
       2. The method of  claim 1 , wherein the first stage and the second stage are consecutive stages. 
     
     
       3. The method of  claim 1 , wherein the first stage is the initial position and the second stage is the final position. 
     
     
       4. The method of  claim 1 , wherein the 3D model of the patient's teeth is generated using a scanning system. 
     
     
       5. The method of  claim 1 , further comprising determining if the forces applied match predicted forces from the orthodontic treatment plan. 
     
     
       6. The method of  claim 1 , further comprising modifying the treatment plan based at least in part on the mapped forces. 
     
     
       7. The method of  claim 1 , further comprising repeating (a)-(f). 
     
     
       8. The method of  claim 1 , further comprising creating a 3D force displacement model of the evaluated mechanical interactions between 3D model of the orthodontic appliance and the 3D model of the patient's teeth, wherein in (f), the mapping of the applied forces is based at least in part on the 3D force displacement model. 
     
     
       9. A method of mapping tooth movements, the method comprising:
 (a) generating an orthodontic treatment plan to move a patient's teeth from an initial position toward a final position, the treatment plan comprising a first stage and a second stage; 
 (b) building a first 3D model of the patient's teeth at the first stage and a second 3D model of the patient's teeth at the second stage; 
 (c) building a first 3D model of a first neutral aligner at the first stage and second 3D model of a second neutral aligner at the second stage; 
 (d) mapping spatial differences between second 3D model of the second neutral aligner at the second stage and first 3D model of the first neutral aligner at the first stage; 
 (e) evaluating mechanical interactions of the second neutral aligner at the second stage with the patient's teeth at the first stage, that corresponds to the first 3D model of the first neutral aligner at the first stage, wherein the evaluating is based at least in part on the mapped spatial differences; and 
 (f) mapping forces applied by the second neutral aligner at the second stage to each tooth of the patient's teeth at the first stage, wherein the mapping of the applied forces is based at least in part on the evaluated mechanical interacts. 
 
     
     
       10. The method of  claim 9 , wherein the first stage and the second stage are consecutive. 
     
     
       11. The method of  claim 9 , wherein the first stage is the initial position and the second stage is the final position. 
     
     
       12. The method of  claim 9 , wherein the first and second 3D models of the patient's teeth are generated using a scanning system. 
     
     
       13. The method of  claim 9 , further comprising determining if the forces applied match predicted forces from the orthodontic treatment plan. 
     
     
       14. The method of  claim 9 , further comprising modifying the treatment plan based at least in part on the mapped forces. 
     
     
       15. The method of  claim 9 , further comprising repeating (a)-(f). 
     
     
       16. The method of  claim 9 , further comprising creating a 3D force displacement model of the evaluated mechanical interactions between 3D model of the orthodontic appliance and the 3D model of the patient's teeth, wherein in (f), the mapping of the applied forces is based at least in part on the 3D force displacement model.